Calculating machine



sept. 2o, 193s. A. KOTTMAN'N 2,130,723

CALCULAT ING MACH INE Filed March 5, 1935 8 Sheets-Sheet 1 1l` @DE Eau@ 32@ Sept. 20, 1938. A. KOTTM A N N 2,130,723

CALCULATING MACHINE Filed March 5. 1935 8 Sheets-Sheet 2 @mi ci@ fria/anfora' iat/as /atnuznn/ Sept. ,20, 1938. A. KoTTMANN 2,130,723

CALCULATING MACHINE Filed March 5, 19:55 `8 sheets-sheet :5

#a 37@ 2 3 35 1a .5f

Sept. 20,1938.

A. KOTTMANN 2,130,723 CALCULATING MACHINE Filed arch 5, 1935 8 Sheets-Sheet 4 Z'hven far:

Sept. 20, 1938. A KoTTMANN CALCULATING MACHINE Filed March 5, 1935 8 Sheets-Sheet 5 sept. zo, 193s.

A. KOTTMANN 2,130,723

CALCULATING MACHINE Filed March 5, 1935 8 Sheets-Sheet 6 2??l I 222 122822 22! WZF/ 203 240 20l\\ I 2Q ME' 20 I'.

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CALCULATING MACHINE Filed March', 1935 8 sheets-sheet '7 ',:weutor: Augz/J Kovwaw?? Sept. 20, 1938. A. KOTTMANN CALCULATING MACHINE 8 Sheets-Sheet 8 Filed March 5, 1935 fly 2f. figg;

Patented sept. 2o, 193s 2,130,723

, UNITEDSTATES PATENT OFFICE CALCULATING MACHINE August Kottmann, Sommerda, Germany, assignor to-Rheinische Metallwaaren-und Maschinenfabrik, Dusseldorf, Germany, a corporation of Germany Application March 5, 1935, Serial No. 9,509 In Germany June 6, 1933 stolaims. (ci. 23S-131) *Y v This invention relates to calculating machines with the tens-carrying means in their initial or and particularly to machines of the kind capable neutral position, in conjunction with the main of both additiveand subtractive operations, the parts of an accumulator drive designed as a present application being a continuation-impart rack drive, A 5 of ,applicants co-pending application Serial No. Fig. 16 is a plan of the arrangements accord- 5 728,603, filed June 1, 1934. In machines of this ing to Fig. 15, the accumulator being shown on kind, it is necessary to provide tens-carrying the right half or the figure, and the racks of mechanism that will function correctly in both the accumulator drive on the left, certain plates,

kinds of calculation. which would otherwise conceal the interior of An object of the present invention is to prothe machine, being cut away, 10 vide a tens-carrying mechanism capable of func- Fig. 17 shows the tens-carrying mechanism aS tioning in both additive and subtractive calculaoperating during subtraction, r

tions arid which will be simple in construction Fig. 18 shows the plan of the parts required and reliable in operation. for carrying over the tens, and for the minus A further object ofthe present invention is to setting of the accumulator,

provide a tens-carrying mechanism which will Figs. 18a, 18h, 18c and 18a are. plan views of be positive in operation and free from over-runthe locking members on an enlarged scale and ning without the inclusion of special over-runin different positionsof operation,

ning prevention means. Fig. 19 is a side elevation of va part of the ma- 20 'I'he invention will be described with reference chine showing the position of certain parts re- 20 vto the .accompanying drawings. quired in subtraction,

Figure 1 shows the calculating machine accord- Figs. 20 and 21 are two views of the minus key ing to the invention,`the cover plates and acwith certain parts co-operating therewith, cumulator being removed, Fig. 22 shows the locking members allocated to Fig. 2 is a plan of the setting gear, with the the minus key, in the locking position', 25

setting members, Fig. 23 is an elevation oi the drive Vfor the tens Fig. 3 is a view, from below, showing the :feed shaft, and

ratchet gear for the setting member carriage,l Figs. l24 and 25 are two views, partly cut away, Fig. 4 is a side elevation of the members for of the actuating members seated on thetensactuating the ratchet gear, carrying shaft.- f I 30 Fig. 5 shows the actuating device for the re- The numerical values to be introduced into turnl stroke of the carriage, the machine are introduced in known manner,

Fig. 6 is a longitudinal section through the by means of the keys I (Figs. 1 and 6); key levers entire machine, with the parts in the initial la and intermediate levers 2, into the setting position, pins 3 of the carriage l. The setting pins thus 35 Fig. 'I shows the arrangement of an actuating raised serve as stops for racks forming the setting rack, 1 members 3 l which are mounted in guide notches Fig. 8 is a view corresponding to Fig. 6 and of the carriage l, and. in being set, actuate at shows the position of the parts when the operthe same time indicating wheels 30 which are A0 ating handle is drawn forward, shortly before also mounted on said carriage. The number o 40 the printing of a calculated value, setting members V3i is the same as that of the Fig. 9 shows the change in position of the parts rows of setting pins 3. When any oi the keys is of the printing mechanism after the impression, struck, the corresponding key lever la depresses Fig. 10 represents details of the printing mecha lever l0 (Figs. 6 and 8) which by means of va anism. lug 35 releases a pawl 34 engaging the corre- 45 Fig. 11 is a side elevation of the drive for the spending setting member 3|. Said member 3i, CODtOl 0f the 3061111111131101, which was previously retained in the neutral Fig. 12 shows the accumulator, with its control position by the pawl 34, is then `free to be actu members in position after' being coupled., to the ated by a. spring 32 (Fig. 2) and moves towards actuating members, the left (Figs. 6 and 8) until its end bears against 56 Fig. 13 is a side elevation showing the parts a simultaneously raised setting pin 3, thus setting in their positions for addition, the member 3i.

Fig. 14'is the front elevation of a detail of a By means of a ratchet mechanism 6, 1, 8 (Fig.- CODtrOl member, 3) which acts on a rack 3 on the carriage 4 andv Fg- 15 is a Side elevation 0f the ,acilmlllatOl .is mounted on a plate S5 oi the machine frame, 55

the carriage 4 ismoved to the left (Figs. 1, 2) to an extent corresponding to the spacing of two adjacent rows of setting pins by the action of a spring i4 (Fig. 2) each time a key is struck, so that the rows of setting pins pass in succession over the ends of the intermediate levers 2 and 1 the pawls 34 pass in succession over the lug 35 \paw1 8 is articulated at i2 to the lever il. ,The

. pin 23h, and the pawl 23 passes into the position on the lever I0.

The ratchet mechanism is actuated by the lever I (Fig. (i) arranged below thekey levers Ia (Fig. 6). When any of the keys i is struck,

the corresponding key lever Ia depresses the lever I0, which in turn depresses the arm I Ia of a lever II (Fig. and thus turns the lever EI about the pivot I Ib. A presser bar I3 which in turn rocks a pawl 8 actuates the two ratchet pawls 8, 1 in the desired manner.

The carriage 4 is returned to its original position when, to veiect an addition or a subtraction, the handle I5 is rocked forwardly and backwardly. The movement of the handle i5 is transmitted, by intermediate members I6, I1, I8 (Figs.

1 and 13), a shaft 45a, a one-armed leverl i9 (Figs. 1 and 5), and a thrust bar 20, to a thrust paw] 23. The bar has an arm 20a (Fig. 5) by which itis guided in a member 2| mounted in the base of the machine. oted on a pin 22 and bears, under the action of a spring 24, against a stop 25 on the thrust bar.' As long as the handle I5 is in normalposition,

the thrust pawl 23 is held in thel position shown in dotted lines in Fig. 5 because the arm 23a`of the pawl ,23 bears against a pin- 235 on the machine frame. When the handle is` moved for wardly the bar 28 ismoved to the right (Fig. 5) whereby the arm 23a is moved away from the shown in full lines in Fig. 5. When the handle I5 44T is returned. to normal position and the bar 20 with pawl 23 moves to the left in. Fig. 5, the pawl encounters an arm'28a on a driver lever 26 (Figs. 1, 2, 5) pivoting on a pin 21 and having an arm with a forked end 26h engaging a pin 28 on the carriage 4.. The rocking movement of the lever 26 forces the carriage 4 back into the original position (Fig. 1), while, at the same time, the pins 3, set at the beginning of the operation, are forced back intotheiroriginal position, sliding under a member v2! provided with a bevel.l

Shortly before the handle I5 returns to its initial position the arm 23a.of the pawl 23 again encounters the pin 23h on the machine frame 4whereby the pawl is restored to the position'.

shown in dotted lines in Fig. 5. If a new number is now set up in the carriage 4 and the latter moves from its normal position, the arm 26a of the lever 26 can move freely over the pawl 23. The return of the setting members 3| will be' de-v scribed later.

Driving or transmission racks 31 (Figs. 1, 6, '1,'8

YIUI, said frame being disposed above the racks 31 and pivotally mounted on a shaft 44. The accumulator IIII can be raised and lowered by turning the accumulator frame about the Shaft 44.

The thrust pawl 23 is piv- The .intermediate pinions 88 are thus brought into' cr out of engagement with the racks 38 whereby the drive connection between the racks 38 and the numeral wheels of the accumulator IUI can be established or interrupted. The accumulator IUI is raised and lowered by means of a curved member 46 (Figs. 11 and 12) mounted on a. shaft 45 which is actuated through intermediate members 32, 83, 94 (Fig. 1) by a shaft 45a, which also eilect's the return movement of the carriage 4 and is actuated in turn by the handle I 5.. When the forward movement of the handle I5 and of the curved member 46 begins, the latter engages a guide roller 41 (Fig. 11) of a lever 48, pivotable for a distance determined by a pin and slot guide 48a about a pin 43a on the accumulator frame 43, and causes the accumulator iUI to descend as the movement of the curved member continues, and to engage, through Vthe intermediate pinions 89, with the rack 38. The

mounted on shaft 45 and having the curved mem-,`

ber 46 thereon. The segment 46e, the curved member 46 and the hook 50 therefore move tol gether in the same manner as if they were integral or in one piece.

At the same moment that the locking hook 50 engages behind the pin 5|, the under sideof the curved member 48 has passed out of contact with the guide ,roller 41 of ythe lever 48. The roller 41 and lever 48 are forced up (Fig. 12) at the same moment by a lever 53 attached to the curved Ymember 48 and under the tension of a spring 52,

so 'that during the return of the' handle into its original position, the guide roller 41 runs back over the upper surface of the curved member and is able to swing the accumulator back into neu- 'trai position by a spring 248, (Fig. 18) one end oi' which engages below the accumulator and presses it upwardly against a stop 24|, while the other end engages under a lug 242 on the frame.

Consequently, during the forward movement of the handle I5, the accumulator is brought into engagement with the racks 3l, and is disengaged during the return movement. Similarly during the forward movement of the handle, the transmission racks 31, 38 are coupled with the setting member 3| by the coupling members 43 actuated by the accumulator frame 43 through the member 42, the coupling being disengaged in the return movement. Y

When the handle I5 ismovcd forward, a driver bar I5 (Figs. 1,' 2, 6, 8, 11) is advanced Ythe distance corresponding to the numerical value 9" by connecting rods 81, 33 (Figs. 11, 13). By this means all the settingmembers 3| previously set in accordance with the items to be added, are returned to the zero position. Thereby the transmission racks- 31 coupled to the setting'members 3| by the coupling membersl 4.3 are moved through a distance corresponding to the amount set. A Excessive movement is prevented by a limiting bar 3l (Figs. 6 and. 8), which is mounted in 75 the carriage 4 transversely in front of the ends of the setting members 3| and stops the latter. from being moved beyond the zero position.

As soon as the handle I5 has reached the end of its forward stroke the accumulator |8I comes out of engagement with the transmission racks 31, 38 as already l.described and the setting members 3| are uncoupled from the transmission racks, said members. and the numerical control rollers 38 being thus again set to zero.

In the return stroke of the handle I5 and driver bar 85 into 'the original position, the latter encounters hooked projections 31e (Figs. 6, 7, 8) of theracks 31 and pushes the latter back into the original position (Fi'g.6) Excessive movement is prevented by a limiting bar 9| (Figs. 6, 7, 8) mounted in the frame 36 transversely across the ends of the racks 31 which prevents them from being moved beyond the original position. Con# sequently, the movement of the transmission racks 31, 38 is wholly positive no springs being employed therefor.

When the setting members are in the position corresponding to the numerical value 9 the driver 85 is closely engaged between the opposing surfaces of the hooks 31c and setting members 3|. When said members are set for the value 0 the driver can reciprocate, between the two surfaces to an extent corresponding to the value 9 without displacing the racks 31 or the members 3|. When the member 3| is set in accordance with the value "3' the driver 85 describes at first, at the beginning 'of both the forward and return strokes, an idle movement corresponding to the value 6 and then pushes the setting member 3|, or the driving rack 31 back into the original po sition. The driver 85 therefore actuates each of the driving racks 31 by the aid of two stops (hook 31e setting member 3|) that are provided thereon and project within the sphere of movement of` the driver, the one stop (hook 31c) being fixed on the driving rack 31 and the other (setting member 3|) being engaged'with the driving rack after being key-set.

The drawbars 81 and88 moving with the driver 85 are connected by means of longitudinal slots 81a, 88a (Figs; 11 and 13) with the arm I8 and the curved member 46 of the shafts 45a and 45. Consequently,4 at the beginning of the forward and return strokes, the handle I5 describes a cer- I tain movement. during which the driver 85 is not moved. During this movement, the accumulator |8I is brought respectively into and out of engagement and the setting member coupled with or uncoupled from, the driving racks. These 0perations therefore proceed with the driver 85 at res Intermediate pinions 48 (Figs. 6, 8, 15, 16)" are in engagement with the transmission racks 31. The upper portions of the toothed intermediate pinions 49 are on'a level with the gear teeth of the racks 38 riveted on the transmission racks 31. The accumulator I8I ally dsplaceable toi a slight extent. When it is pushed towards the left (Figs. 16, 18), the intermediate pinions 89 of the accumulator engage with the racks 38 and when the accumulator is pushed towards the right, they engage with the intermediate pinions 48 of the gear driving the accumulator. In the former case, the action is one of' addition, and in the latter case one of subtraction.

I To provide the lateraldisplacement of the accumulator |8I, the numeral wheels thereof (Figs. 15, 16, 1'() are disposed, with the corresponding displacement of the frame rims of these is laterintermediate pinions 89 and locking pawls |83, in a frame |84, which, in turn, is slidably mounted in the frame 43 adapted to swing on a cross shaft 44. The frame |84 has lateral pins |81 sliding in gaps in the eeks of the-frame 43. At the same time, t enumeral wheels of the accumulator |8| are guided into window openings |28 in the cover plate |38.

It should be noted that in Fig. 16 there is shown at the left only the driving members, viz. 31, 38 and the intermediate wheels 49, the overlying parts of the accumulator being omitted. At the right of the ligure, on the contrary, there are shown only the parts of the accumulator overlying the racks 31, 38, and of the tenscarrying mechanism, and the underlying drive racks are omitted for clearness. Nevertheless the machine isprovided with a rack 31, rack 38 and intermediate wheel 39 for each decimal place including the units. The pinion 38 of each decimal place of the accumulator lies during addition in the plane of the rack 38, and during subtraction in the plane. of the wheel 48.

In changing over to subtraction, the lateral |84 is effected by depressing a minus -key 96 (Figs. 18, 20, 2l) provided on the keyboard, said key rocking a lever 88, shaft 98 and lever |88 (Fig. 19) by meansof the pinv 91 disposed on its stem 96a. The lever |88 produces a lateral displacement of a connecting bar 282, guided in a bracket 281, against the pull of thespring 28|. The bar 282 has a bevel 28211 which, on the minus key 96 being struck, is pushed under a roller 283 on a lever 284. The displacement of the bar 282 lifts the roller 283 and turns the lever 284 against the action of a spring 284a.

The lever 284 engages in a fork 2851) (Fig. i8) of a lever 285, which is pivotally mountedon pin 206 on the frame 43 of the accumulator and engages with its other arm 285a, on the one cheek |84a of the frame |84 that is to be displaced laterally. Consequently, depressing the minus key 86 moves the frame |84 to the right against the spring IIS, the machine being thereby changed over to effect subtraction.

The minus key 86, which is `constrained by the spring 289 (Fig. 20) to rise again directly after being depressed is locked in the bottom position, by a locking is at an end. With this object, a lever 2|8 (Figs. 18, 20, 2l, 22) is articulated to the stem of the minus key, so as to pivot on an axis 2| I, which lever has an arm 2I2 engaging in a slot 2I3 of a U-shaped holder 2|4.

The holder 2I4 carries a pawl 2I6, adapted to turn on a pin 2|5, and a locking slide 2I1 guided by a. slot 2I1b. VBoth are drawn together by a spring 2 I8. When the minus key is not operated, and the handle is in neutral position, the spring 2|8 draws the pawl 2I6 and the projection 2I1a of the slide 2I1 towards the lateral faces of the arm 2I2 of the lever 2|8 (Fig. 18). `When the minus key 96 is depressed, the arm 2I2 in Figs. 18 and 22 is moved slightly towards the left, whereupon, as shown in` Fig. 22, the pawl 2|6 engages behind the arm 2I2 and locks ,the key 86 in bottom position. A

Articulated to the slide 2I1 at 2|8 is'a ylever 22| (Fig. 21) which is influenced by a curved cam 228 movedtby the handle I5 through the rods I5,

On .the handle I5 being operated in performing subtraction, and the curved surface 228 moved with it, the control lever 22|, lying in a device, until the subtraction notch 22ccin said cam is forced out oi the notch against the action oi the spring 22Ia and new slides over the periphery of the cam. By these means the slide 2H and the pawl 2I$ (Fig. 22) are raised,so that the ascending pawl 2I5 releases the arm 2I2 of the lever 2I0. Said arm 2|2 (Fig. 22) can therefore spring a little towards the right, but in so doing it bears against a projection 2|'Ia on the slide 2I'I and is retained thereby untii the return oi the handle I 5 into the original position causes the end of the control lever 22I to re-engage in. the notch 220e, under the influence of the spring 22M. By this means the slide 2|] (Fig. 22) is again slightly depressed into its original position represented in Fig. 18, so that the arm 2|2 of the lever 2|!) is released. The operation of the locking member is clearly shown in Figs. 18a, 18h, 18e and 18a', in which the projection 2IIa of thevslide 2|'I and the end 2| G a of the pawl 2IB are arranged in the same plane. In the normal position the arm '212 of the lever 2|II lies betweenthe ends 2I'Ia and 2I6a as shown in Fig. 18a. II the subtraction key 98 (Fig. 20) is pressed, then the arm 2|2 oi' the lever 2|0 will assume the position shown in Fig. 18h. The end 2I6a of the pawl 2|6 will hold the arm 2I2 in this position as shown in Fig. 18h whereby the subtraction key 9S will be `held in the depressed position. If the handle I5 (Fig. 21) is moved toward the front in order to carry out a subtraction, then, as explained in the foregoing the slide 2I'I will be moved up the distance a as shown in Fig. 18e.v The end 2IIa of the slide 2|I also moves up the end 2|6a of thepawl 2|6 so that this will free the arm 2|2 of the lever' 2|0. The arm 2I2 is now under the influence of the spring 209 (Fig. 20) against the end 2I'Ia oi the slide 2|1. The minus key ,96 will move somewhat upwards from its lowest position, but if the machine is maintained in this 'position ofthe key 9B it will be still connected for subtraction.

II the handle I5 is now moved back then the slide 2 I I is again moved downwardly the distance a. 'I'he end 2I'Ia will now move out oi' the path of movement ofthe arm I2 but the pawl 2I6 cannot follow the slide 2|'I since its end 2|8a is against the lside surface of the arm 2|2. Therefore, the arm 2|2 will move into the position shown in Fig. 18a', and this latterposition corresponds with the position ot the parts shown in Fig. 18a. The minus key 86 will then return to its original position.

The lever 2li, the minus key I6, and all the parts displaced by the latter, then return to'their original position. In particular, the frame |04 is also returned to its'leit-hand end position by the springs IIS, thus re-setting the machine for addition.

The upper edge of the cover plate |20 containing the window openings |29 (Fig. 16) is provided with guide slots III), in which levers IIB for preparing tenscarry-rotatably mounted about an axis III! (Figs. 15. 16, 17) and laterally dispiaceable within certain limits-are guided in such a manner that,"durlng the change over from addition to subtraction;` they share the`lateral shifting oi.' the frame |24 and their ends Ilia are always within the sphere of movement of tens- -iriry'preparing lugs Illa on the numeral wheels numeral wheels IIII ofthe accumulator passes lfrom 9 to 0, or from 0 to 9, the cam Illia on the numeral wheel will turn its allotted preparatory lever III causing its rear extremity during. addition or subtraction, one of the raisonne Iib to press on an arm IIIb oi' a pawl II'I and, aided oy the spring IIB, brings said pawl into a. position in which it locks the lever IIU in the preparatory position.

Pins IIIIc on the levers III! engage longitudinal slots III in slides II2 which are guided by transverse notches on. the shaft |09. The corners i|2a (Fig. 17) of the slides oi those levers IIII that are locked in the preparatory position lie within the sphere of movement oi' cams III, which are oiset on the shaft 44 round which the I rame 43 oi the accumulator IUI swings, and therefore the shaft 44 is also the driving shaft of the tens-carrying mechanism. It is actuated after the values have been transferred into the accumulator and the latter is again brought out of engagement with its actuating mechanism, the shaft 44 making one clockwise revolution for each operation of the machine. "I'he cams H3 then displace, to the right, the slide |l2 of any lever III) (Figs. and 17) that is locked in the preparatory position.

The drive of the tens-carrying shaft 44v is shown in Figs. 23, 24 and 25. By means ofv rods I6, I1, I8, I9, the handle I5 actuates a toothed sector 221, which gears with a piniony 224 on the shait 44, and is provided with such ai number oi' teeth that it imparts one revolution to the pinion, in one or the other direction, both during the forward and return movement of the handle. The hub 225 (Fig. of the pinion 224 carries a driver tooth 226 which lies close in front of a disc 228, keyed on the tens-carrying shaft 44 and provided with a driver pawl 230 which is under the tension of a spring 22S. When the machine is in neutral position, said pawl lies in the posi--- tion, in relation to the driver tooth, shown in Fig. 25. During the forward movement of the handle I5, the pinion 224 and the driver 22S (Fig. 25)

describe one clockwise revolution. The pawl 23D,

disc 228 and shaft 44 do not share this move' 230, disc 228 and shaft 44, which latter describes the revolution necessary for actuating the tens- A carrying slide ||2.

Pivotally mounted on pins |24 and |24a on the slides ||2, are two tens-carrying pawls 4, ||5 (Figs. 15, 17), which coact by means of lever arms ||4a and |I5a and, when-the tens-carrying device is out of action, are held by the spring |26 in the position shown in Fig. 15, in which the pawl ||4 bears against the pin |25. 'Ihe tip |155 ot the lower pawl ||5 is bent sideways to the same extent as the frame |04 is displacedv laterally during the change over from addition to subtraction. The Atwo pawls |I4 and I I5 are so arranged that, when the frame |04 is in the left position (referred to Fig. 16), that is to say, set for addition, the intermediate pinions 89 lie in the same 'vertical planeas the tips ||4b of the pawl H4, and when the frame |U4is in the right-handposition, that is, set for subtraction, said pinions 89 are in the same plane as the tips ||5b of the pawl IIS, and-reckoning from the accumulator order wherein the preparatory cam IDIa has become operativethe'pawls ||4 and I|5 engagein the intermediate pinion 8S of the next higher order oi the accumulator.

the corresponding intermediate pinion 89. After the slide |I2 has been moved a certain distance towards the right, the arm ||4a of the pawl |I4 strikes against the shaft |09 whereby the arms II4a and'I |5a of the paw1s||4 and ||5 are prevented from moving farther to the right. During the further movement of the slide I I2 towards the right the pawls I|4 and I|5 are consequently swung round the pins |24 and I24a in such a manner that the ends II4b and' ||5b move like the jaws of closing tongs, that is to say, the tip |I4b of the pawl |I4 descends, and the tip ||5b of the pawlY II 5 ascends.

When the frame |04 is in the left-hand position, and the machine is therefore set for addition, the pawl II4 engages in the pinion 89, so that the numeral wheel is turned in the additive direction a distance corresponding to one unit. With the frame |04 in the right-hand position, and the machine therefore set for subtraction, the pawl II5 engages in the intermediate pinion 89 and turns the numeral wheel in the subtracting direction.

Towards the end of the operative movement of the pawls |I4 and I|5, the arm ||5a of the pawl I|5 strikes against a pin |21, whereby any overrunning movement of the pawls I I4 and I I5, and

the numeral wheels they actuate. is reliably prevented. s,

At the same moment that the arm I |5a of the pawl II5 bears against the stop pin |21, the

vcam I|3 of'the shaft 44 slides off the edge |I2a During the further rotation of the slide II2. of the-shaft 44, a pin II9 on the cam II3 strikes against the downwardly bent endof an arm I |1b of the locking pawl III, thus forcing the latter out of the locking position. The preparatory lever IIO then returns to its original position, under the pull of the spring |28, and the slide |I2 returns to neutral position under the pull of the spring |20.

The rear ends of the lower edges of the transmission racks 31 are provided with gear teeth 31a (Figs. 6, '7, 8) which are engaged by the toothed quadrants 54, these latter, in turn, carrying on arms 54a type carriers 55 of the printing mechanism. In proportion as the racks 31 are moved by the setting members 3| with which they are coupled the type carriers are also raised, in a positive manner, so that, in accordance with the setting of the racks and type carriers, the values transferredinto the counting mechanism can be printed on a strip of paper clipped on to a platen 56 (Fig. 8).

The impression mechanism of the printing device (Figs. 1, 6, 8, 9, 10) consists'of a number of press pawls 51, corresponding to the number yof orders in the accumulator, said pawls being adjacently disposed on )a shaft 58 fixed in a frame 60 (Figs. 6, 8, 10) adapted to swing on a shaft 59, parallel with the axis of the platen. The movement of these pawls about the shaft 58 in the direction of the platen is restricted by a bar 6| (Fig. 9), against which the projections 51a of the pawls 51 bear. Pressure levers 63 carrying weights 63a areallotted to the pawls 51, and are controlled by springs 64,'but are normally held in a neutral position by'locking pawls 65 (Figs. 6 and 8) In 'addition a locking bar common to all thepressure levers is mounted in the frame of the machine and engages in notches in the levers 63, being released just before the printing operation by devices which will be described later.

The locking pawls 65 form part of the zeroprinting device and coact with releasing pawls 61, the number of which is the` same as that of the transmission racks 31. When the corresponding transmission racks are in neutral position, the tip 61a. of each releasing pawl 61 engages in a recess 31h of the transmission rack (Fig. 6). As soon as the transmission rack-leaves its original position, its unrecessed portion passes under the tip of the pawl, thereby turning the pawls 61 and 65 and effecting the release of the pressure lever 63 (Fig. 8). On their right side, the pawls 61 are provided with pins`68, while the left sides are provided with lugs 69 of such dimensions that, in each case, the pin 68 of each pawl lies under the lug of the next lower, adjacent pawl, so that if any pawl be raised by its allotted transmission rack all the pawls lying to the right of it in Fig. 1 will also be raised whereas the pawls onthe left will remain in the locked position. In printing a. value containing a smaller number of figures than there are orders inthe printing mechanism, the pawls 65, 61 prevent the impression of Os in front of the rst numeralof the multinumeral value to be printed, whereas zeros inside the row of numerals are printed.

During the forward movementof the handle I5, the frame 60, with the press pawls 51, is swung, by means of the shaft 45a, shaft 45, curved member 46, drawbar 13 (Figs. 1 and 11) and the arm 10,A towards the platen 56, in such a manner that the press pawls 51 bear against the back of the type carriers and bring the latter so close to the platen 56 that the type characters almost touch the paper, whereas the pressure levers 63 are held at first in their original position in relation to the frame of the machine by the bar 1I. During the swinging of the frame 60, tension is applied to the springs 64 of the pressure levers 63, which springs are attached at one end to the cross bar 6I of the frame 60. Shortly before the handle I5 reaches the end of its forward stroke, a striker pin 15 (Fig. 13) which is arranged on the lever arm I6, connected to the handle, comes into contact with a surface 16 on a two-armed lever 1'I and deilects the latter in such a manner that its second arm moves a pivotal release member 18 (Figs. 13, 14). The arm 18a two pivots 19 and 80, moves a pin 1Ia on the bar 1| when said member is deflected and swings the I bar 1I out of the locking position. A roller 8|,(:

arranged on an angular bend of the same arm 18a influences a rocking member 82 (Fig. 13) so that the latter forces a. straight-edge 12 (Figs. 13, 6, 8) into the toothed sector 54 (Fig. 8). These last described members are relatively arv ranged so that, in the' rst place, the straight-1 edge 12 engages inthe tooth gaps of the sector 54, after which the arm 18a comes in contact with the pin 1.Ia and effects the release of the springcontrolled pressure lever 63. The forward movement of the release member 18 brings a locking pawl 84 (Fig. 13) controlled by a spring 83, into position behind the arm 18h, and locks the release member until the handle is moved back again.

At the moment the locking bar 1I is being released, the springs 64 swing the pressure levers of the member 18, which turns on y The thrust ban 20, moved by the handle l5 and actuating the return mechanism of the carriage of the setting members, carries a pin 86 (Fig. i3) which, at 'the beginning of the return stroke oi the handle i5, lifts the curved arm 84a of the locking pawl 84! and thus frees the locking of the release member 18, by which means the straightedge l2, obeying the pull of a spring 12a (Fig. 8) detachee itself from the teeth. of the sector 54, and the locking bar 'il is released again., During the lfurther return movement of the handle l5, the

driver 85 actuated thereby pushes the transmission racks 3l back into the original position, as already described thus returning the type carrers into their original position.

The frame 60 carrying the printing mechanism is also swung back Aduring the return of the handle I5 into'its original position by means of the shaft 45a, shaft l5, curved plate 46 and drawbar 13, the pressure levers 63 being again locked by the descent of the locking pawls 55, while, at the same time, the locking bar 1| is enabled by spring tension to engage in the notches in the pressure levers. f

The return ofithe pawls 65 into locking position is rendered possible through the return of the allotted driving racks into neutral position so that the release or control pawls 6l are' able to drop into the recesses 31h provided, in the same, thereby enabling the pawls 65 to move into the looking position.V

The invention has been described herein as applied to a ten keycalculating machine, but it is to be understood that thev invention is not limitedl to application to this particular machine nor to those of similar type, and may be employed generally in calculating machines. I claim as my invention:

1. In a calculating machine, a tens-carrying device between a lower order and a higher order wheel and operable in the accumulator when its gears are out' of mesh with the actuators, comprising a slide, a cam operated during tens-carrying to move the slide, an additive tens-carrying pawl and a subtractive tens-carrying pawl mounted on the slide and so arranged that 'one or the other of said pawls is brought into cooperation with a gear in the accumulator when the cam is operated, and a stop on the slide for arresting the pawls at the ends of their tenscarrying movement and while the effective pawl is in over-running preventing engagement with the accumulator gear.

2. In a calculating machine, a tens-carrying device between a lower order and a higher 'order wheel and operable in the accumulator when its gears are out of mesh with the actuators, comprising a slide, a cam operated during tenscarrying tomove the slide, an additive tens-car- 4 rying pawl' and a subtractive tens-carrying pawl mounted on the slide and so arranged that one or the other of said pawls is brought into cooperation with a gear in the accumulator when the cam is operated, a stop for arrestingthe.

pawls at the ends of their tens-carrying movement and while the effective pawl is in over-running preventing engagement with the accumulator gear, and a carry preparing lever actuated by the numeral wheel of the next lower` order assures passing through zero and on :which lever the slide is movably mounted, the arrangement being such that actuation of the preparing lever brings the slide into the path/oi the cam.

3. A tens-carrying mechanism according to claim 2, in which a cross shaft is provided and the tens-carry preparing lever is transversely slidably arranged on the cross shaft.

4. In a calculating machine, a tens-carrying device between a lower order and a higher order wheel and operable in the accumulator when its gears are out of mesh with the actuators, comprising a slide, a cam operated during tens-carrying to move the slide, an additive tens-carrying pawl and a subtractive tens-carrying pawl mounted on the slide and so arranged that one or the other of said paWls is brought into cooperation with a gear in the accumulator when the cam is operated, a stop for arresting the pawls at the ends of their tens-carrying movement andv while the eiectivepawl is in over-running preventing engagement with the accumulator gear, a carry preparing lever actuated by the numeral wheel of the next lowerorder when passing through zero to bring the slide into the path ofthe cam and on which lever the slide is movably mounted, and means for positively locking the tens-carry preparing lever in a position holding the slide in the path of the cam when the corresponding numeral wheel in the accumulator passes through zero.

5.In a calculating machine, a tens-carrying device between a lower order and a higher order wheel and operable in the accumulator when its gears'are out of mesh with the actuators, comprising a slide, a cam ,operated during tens-carrying to move the slide, an additive tens-carrying pawl and'a subtractive tens-carrying pawl mounted on the slide and so arranged that one or the other of said pawls is brought into-coop eration with a gear in the accumulator when the cam is operated, a stop for arresting the pawls at the ends. of their tens-carrying movement and while the eilective pawl is in over-running preventing engagement with the accumulator gear, a carry preparing lever actuated by the numeral wheel of the next lower order when passing through zero to bring the slide into the path of the cam and on which lever the slide is movably mounted, means for positively locking. the tens-carrying preparing lever' in a position holding the slide in the path of the cam when the corresponding numeral Wheel in the accumulator passes through zero, and means on the cam for subsequently moving the locking means into position releasing the tens-carry preparing lever.

6. A tens-carrying mechanism according to claim l, in which the additive and subtractive tens-carrying pawls have coacting extensions1 which co-operate with a stop in the latter part of the tens-carrying movement of the slide to cause said pawls to eiect a tongs-like movement while One of said pawls is in engagement with the corresponding numeral wheel.

7. In a calculating machine, a tens-carrying device between a lower ordertand a higher order wheel and operable in the accumulator when its gears are out of mesh'with the. actuators'comprising a slide, a cam operated during tens-carrying to move the slide, an additive tens carrying pawl andv a subtractive tens-carrying pawl mounted on the slide and so arranged that one or the other of said pawls is brought into co-operation with a vgear in theaccumulator when vto the cam is operated, a stop for arresting the pawls at the ends of their tens-carrying movement and while the eiiective pawl is in over-running preventing engagement with the accumulator gear, and a tens-carrying preparing lever arranged substantially parallel to the actuators, said lever being actuated by the numeral wheel of the next lower order passing through zero and on which lever the slide is movably mounted.

8. A tens-carrying mechanism according to claim 2, in which means is provided so that the accumulator has a limited transverse shift between additive and subtractive positions, said tens-carrying preparing lever participating in this shift and means being provided to retain said lever in the path of carrying lugs on the numeral wheels oi' the accumulator in both positions of the accumulator.

AUGUST KOI'IMANN. 

